Facebook will overhaul its ad-targeting systems to prevent discrimination in housing, credit and employment ads as part of a legal settlement. For the social network, that's one major legal problem down, several to go.

Even as studies were showing increases in symptoms of depression and in suicide among adolescents since 2010, some researchers called the concerns overblown. But a new analysis suggests the mental health epidemic affecting the young is all too real.

Apple's iPhones and iPads have gotten free software updates, including battery improvements and a smarter virtual assistant. The new features and capabilities in the update, iOS 9, are primarily refinements rather than anything transformative.